Run full backup with Dirvish, mount and unmount the external backup drive, and send status output to the desktop environment as notifications

backup.sh

#!/bin/sh

MOUNTPOINT=/mnt/backup

notify() {
	returncode=$1
	summary=$2
	message=$3

	if [ $returncode -gt 0 ]; then
		urgency=critical
		timeout=1000
	else
		urgency=low
		timeout=10000
	fi

	notify-send --urgency=$urgency --expire-time=$timeout "$summary" "$message"
}

notify_live() {
	summary=$1
	while read line; do
		accu="$line"
		while read -t 1 more; do
			accu=`echo -e "$accu\n$more"`
		done
		notify-send "$summary" "$accu"
	done
}

output=$(gksudo -- mount --verbose $MOUNTPOINT 2>&1)
notify $? "Backup" "$output"

output=$(gksudo -- dirvish-runall | notify_live "dirvish" 2>&1)
df=$(df -h $MOUNTPOINT)
notify $? "Backup finished" "$df"

output=$(gksudo -- umount --verbose $MOUNTPOINT 2>&1)
notify $? "Backup" "$output"